The Internet Interdisciplinary Institute (IN3) is a research centre of the Universitat Oberta de Catalunya (UOC) specializing in the knowledge society, and more specifically in the study of the Internet and the effects of the interaction between digital technologies and human activity. The IN3 hosts a number of renowned research groups that carry out a wide range of research of an interdisciplinary nature. Every year the centre hosts visiting professors and researchers; its researchers participate in the UOC's doctoral programmes.

The Institute is, furthermore, defined by its interdisciplinary research between the social, human and life sciences on the one hand and engineering on the other. The research groups from these two areas work together closely on the design and development of the Internet of the future, taking into consideration both the ICT- and Internet-related technological aspects and the effects of these on human activity.